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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 2133 | * Filters whether to treat the upload bits as an error. |
| 2134 | * |
| 2135 | * Passing a non-array to the filter will effectively short-circuit preparing |
| 2136 | * the upload bits, returning that value instead. |
| 2137 | * |
| 2138 | * @since 3.0.0 |
| 2139 | * |
| 2140 | * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return. |
| 2141 | */ |
| 2142 | $upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) ); |
| 2143 | if ( !is_array( $upload_bits_error ) ) { |
| 2144 | $upload[ 'error' ] = $upload_bits_error; |
| 2145 | return $upload; |
| 2146 | } |
| 2147 | |
| 2148 | $filename = wp_unique_filename( $upload['path'], $name ); |
| 2149 | |
| 2150 | $new_file = $upload['path'] . "/$filename"; |
| 2151 | if ( ! wp_mkdir_p( dirname( $new_file ) ) ) { |